It's Hard To Limit U.S. Stock Exposure

With the U.S. stock market teetering near its highest level in history and money flowing back into stocks for the first time in years, you are right to be getting worried.

And not only because stocks are looking frothier. Many investors don't realize that they also have made implicit bets on U.S. stocks by purchasing other assets indirectly tied to them, such as high-yield and emerging-market bond funds.